Public bug reported:
This has been occurring during the Xubuntu post-install test. It's not
the same as Bug #1776475, as it's not necessary to have logged in as
another user (or even for another user to exist) for the problem to
happen.
My sequence of actions is:
*Create new user.
*Open a program (usually Thunar or Terminal).
*Lock session.
*Click on "Switch User". <-- This is all that's necessary to trigger it.
*Enter password to unlock my own session.
*Then there's a delay and screen goes black, then the unlock prompt appears
again.
*The second time, my session unlocks.
This particular report is from a QEMU/KVM vm, but it's also been
happening on a bare-metal install.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: lightdm 1.30.0-0ubuntu3.1
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
Date: Wed Apr 22 15:30:29 2020
InstallationDate: Installed on 2020-04-22 (0 days ago)
InstallationMedia: Xubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200421)
ProcEnviron:
LANGUAGE=en_NZ:en
TERM=xterm-256color
PATH=(custom, no user)
LANG=en_NZ.UTF-8
SHELL=/bin/bash
SourcePackage: lightdm
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: lightdm (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
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https://bugs.launchpad.net/bugs/1874178
Title:
Unlocking existing session needs two attempts after selecting Switch
User
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